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Thanks everyone who responded, this is now sorted. </div>
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Special thanks to James @ Micron21 who managed to work some magic for us and get this resolved.</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Lincoln Dale <ltd@interlink.com.au><br>
<b>Sent:</b> Friday, May 10, 2024 7:55 AM<br>
<b>To:</b> Elliott Willink <elliott@willink.net.au><br>
<b>Cc:</b> AusNOG@lists.ausnog.net <ausnog@lists.ausnog.net><br>
<b>Subject:</b> Re: [AusNOG] Contact at GTT for a routing issue</font>
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<div dir="ltr">On Thu, May 9, 2024 at 7:35 PM Elliott Willink <<a href="mailto:elliott@willink.net.au">elliott@willink.net.au</a>> wrote:<br>
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Sorry for the noise - possibly a long shot but does anyone have a contact at GTT who may be able to assist resolve routing issues with US traffic?</div>
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NOC emails get a generic replying saying they are investigating on loop, NOC phone number seems to be disconnected and their general phone number won't do anything without a service ID. </div>
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<div>How about you post the prefix in question that you see looping and then others can maybe look deeper into it.</div>
<div>Did you also check to see that its legitimate in various looking glasses and e.g. do you see the same in ripe probes or similar?</div>
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<div>There are definitely cases where loops can/do happen beyond being transient. Router software bugs ("stuck bgp routes" / "timing race conditions on programming hardware") can/do/have happened, but are less common these days.</div>
<div>But if its your prefix that you control, you can probably resolve it either by withdraw/re-announce of it, changing a transitive attribute that forces a refresh of it, possibly doing so via announcing either a more-specific or less-specific to backstop
it.</div>
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